Re: r1.21 of sys/net/hfsc.c cripples networking speed
On 24 Apr 2015, at 3:39 pm, Theo de Raadt dera...@cvs.openbsd.org wrote: After updating one of my machines to a more recent snapshot I noticed that networking speed was reduced and that the machine was 'less' responsive. Be aware there is a fairly expensive debugging diff in the snapshots (it is not actually commited). yeah. have you tried the speed of a current kernel you've built yourself? dlg
Re: r1.21 of sys/net/hfsc.c cripples networking speed
On Fri 24/04/2015 16:25, David Gwynne wrote: On 24 Apr 2015, at 3:39 pm, Theo de Raadt dera...@cvs.openbsd.org wrote: After updating one of my machines to a more recent snapshot I noticed that networking speed was reduced and that the machine was 'less' responsive. Be aware there is a fairly expensive debugging diff in the snapshots (it is not actually commited). yeah. have you tried the speed of a current kernel you've built yourself? dlg Just tested a current kernel without a hitch. Guess my observation is the result from the fairly expensive debugging diff. Sorry for the noise... For future references: is it possible to see if a kernel from snapshots contains 'non committed' code? -- Björn Ketelaars GPG key: 0x4F0E5F21
Re: r1.21 of sys/net/hfsc.c cripples networking speed
For future references: is it possible to see if a kernel from snapshots contains 'non committed' code? No. It is rare. However the process has been a great success, so it will be done every once in a while.
r1.21 of sys/net/hfsc.c cripples networking speed
Hello, After updating one of my machines to a more recent snapshot I noticed that networking speed was reduced and that the machine was 'less' responsive. Quick look in systat revealed that softnet was hammering the processor (90% interrupt on CPU0). After reverting to a backup (older kernel) the issue with softnet claiming the processor was gone. I once more attempted the more recent kernel disabling queuing in pf (wild guess). This resolved my issue with networking speed. After some digging in the CVS log I noticed that revision 1.21 of sys/net/hfsc.c [0] altered code related to pf queueing. A test, using a kernel without the above changeset, results in a machine that is behaving as expected. As I do not understand the changed code I was wondering if there is a reason why the commit has such an impact on the system resulting in a decreased networking speed? [0] http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/sys/net/hfsc.c.diff?r1=1.20r2=1.21f=h -- Björn Ketelaars GPG key: 0x4F0E5F21
Re: r1.21 of sys/net/hfsc.c cripples networking speed
After updating one of my machines to a more recent snapshot I noticed that networking speed was reduced and that the machine was 'less' responsive. Be aware there is a fairly expensive debugging diff in the snapshots (it is not actually commited).
